1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * phylink models the MAC to optional PHY connection, supporting 4 * technologies such as SFP cages where the PHY is hot-pluggable. 5 * 6 * Copyright (C) 2015 Russell King 7 */ 8 #include <linux/acpi.h> 9 #include <linux/ethtool.h> 10 #include <linux/export.h> 11 #include <linux/gpio/consumer.h> 12 #include <linux/netdevice.h> 13 #include <linux/of.h> 14 #include <linux/of_mdio.h> 15 #include <linux/phy.h> 16 #include <linux/phy_fixed.h> 17 #include <linux/phylink.h> 18 #include <linux/rtnetlink.h> 19 #include <linux/spinlock.h> 20 #include <linux/timer.h> 21 #include <linux/workqueue.h> 22 23 #include "sfp.h" 24 #include "swphy.h" 25 26 #define SUPPORTED_INTERFACES \ 27 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \ 28 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane) 29 #define ADVERTISED_INTERFACES \ 30 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \ 31 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane) 32 33 enum { 34 PHYLINK_DISABLE_STOPPED, 35 PHYLINK_DISABLE_LINK, 36 PHYLINK_DISABLE_MAC_WOL, 37 }; 38 39 /** 40 * struct phylink - internal data type for phylink 41 */ 42 struct phylink { 43 /* private: */ 44 struct net_device *netdev; 45 const struct phylink_mac_ops *mac_ops; 46 const struct phylink_pcs_ops *pcs_ops; 47 struct phylink_config *config; 48 struct phylink_pcs *pcs; 49 struct device *dev; 50 unsigned int old_link_state:1; 51 52 unsigned long phylink_disable_state; /* bitmask of disables */ 53 struct phy_device *phydev; 54 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ 55 u8 cfg_link_an_mode; /* MLO_AN_xxx */ 56 u8 cur_link_an_mode; 57 u8 link_port; /* The current non-phy ethtool port */ 58 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 59 60 /* The link configuration settings */ 61 struct phylink_link_state link_config; 62 63 /* The current settings */ 64 phy_interface_t cur_interface; 65 66 struct gpio_desc *link_gpio; 67 unsigned int link_irq; 68 struct timer_list link_poll; 69 void (*get_fixed_state)(struct net_device *dev, 70 struct phylink_link_state *s); 71 72 struct mutex state_mutex; 73 struct phylink_link_state phy_state; 74 struct work_struct resolve; 75 76 bool mac_link_dropped; 77 78 struct sfp_bus *sfp_bus; 79 bool sfp_may_have_phy; 80 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 81 u8 sfp_port; 82 }; 83 84 #define phylink_printk(level, pl, fmt, ...) \ 85 do { \ 86 if ((pl)->config->type == PHYLINK_NETDEV) \ 87 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \ 88 else if ((pl)->config->type == PHYLINK_DEV) \ 89 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \ 90 } while (0) 91 92 #define phylink_err(pl, fmt, ...) \ 93 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__) 94 #define phylink_warn(pl, fmt, ...) \ 95 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__) 96 #define phylink_info(pl, fmt, ...) \ 97 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__) 98 #if defined(CONFIG_DYNAMIC_DEBUG) 99 #define phylink_dbg(pl, fmt, ...) \ 100 do { \ 101 if ((pl)->config->type == PHYLINK_NETDEV) \ 102 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \ 103 else if ((pl)->config->type == PHYLINK_DEV) \ 104 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \ 105 } while (0) 106 #elif defined(DEBUG) 107 #define phylink_dbg(pl, fmt, ...) \ 108 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__) 109 #else 110 #define phylink_dbg(pl, fmt, ...) \ 111 ({ \ 112 if (0) \ 113 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \ 114 }) 115 #endif 116 117 /** 118 * phylink_set_port_modes() - set the port type modes in the ethtool mask 119 * @mask: ethtool link mode mask 120 * 121 * Sets all the port type modes in the ethtool mask. MAC drivers should 122 * use this in their 'validate' callback. 123 */ 124 void phylink_set_port_modes(unsigned long *mask) 125 { 126 phylink_set(mask, TP); 127 phylink_set(mask, AUI); 128 phylink_set(mask, MII); 129 phylink_set(mask, FIBRE); 130 phylink_set(mask, BNC); 131 phylink_set(mask, Backplane); 132 } 133 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 134 135 void phylink_set_10g_modes(unsigned long *mask) 136 { 137 phylink_set(mask, 10000baseT_Full); 138 phylink_set(mask, 10000baseCR_Full); 139 phylink_set(mask, 10000baseSR_Full); 140 phylink_set(mask, 10000baseLR_Full); 141 phylink_set(mask, 10000baseLRM_Full); 142 phylink_set(mask, 10000baseER_Full); 143 } 144 EXPORT_SYMBOL_GPL(phylink_set_10g_modes); 145 146 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 147 { 148 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 149 150 phylink_set_port_modes(tmp); 151 phylink_set(tmp, Autoneg); 152 phylink_set(tmp, Pause); 153 phylink_set(tmp, Asym_Pause); 154 155 return linkmode_subset(linkmode, tmp); 156 } 157 158 static const char *phylink_an_mode_str(unsigned int mode) 159 { 160 static const char *modestr[] = { 161 [MLO_AN_PHY] = "phy", 162 [MLO_AN_FIXED] = "fixed", 163 [MLO_AN_INBAND] = "inband", 164 }; 165 166 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 167 } 168 169 static int phylink_validate(struct phylink *pl, unsigned long *supported, 170 struct phylink_link_state *state) 171 { 172 pl->mac_ops->validate(pl->config, supported, state); 173 174 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 175 } 176 177 static int phylink_parse_fixedlink(struct phylink *pl, 178 struct fwnode_handle *fwnode) 179 { 180 struct fwnode_handle *fixed_node; 181 const struct phy_setting *s; 182 struct gpio_desc *desc; 183 u32 speed; 184 int ret; 185 186 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 187 if (fixed_node) { 188 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 189 190 pl->link_config.speed = speed; 191 pl->link_config.duplex = DUPLEX_HALF; 192 193 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 194 pl->link_config.duplex = DUPLEX_FULL; 195 196 /* We treat the "pause" and "asym-pause" terminology as 197 * defining the link partner's ability. 198 */ 199 if (fwnode_property_read_bool(fixed_node, "pause")) 200 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 201 pl->link_config.lp_advertising); 202 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 203 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 204 pl->link_config.lp_advertising); 205 206 if (ret == 0) { 207 desc = fwnode_gpiod_get_index(fixed_node, "link", 0, 208 GPIOD_IN, "?"); 209 210 if (!IS_ERR(desc)) 211 pl->link_gpio = desc; 212 else if (desc == ERR_PTR(-EPROBE_DEFER)) 213 ret = -EPROBE_DEFER; 214 } 215 fwnode_handle_put(fixed_node); 216 217 if (ret) 218 return ret; 219 } else { 220 u32 prop[5]; 221 222 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 223 NULL, 0); 224 if (ret != ARRAY_SIZE(prop)) { 225 phylink_err(pl, "broken fixed-link?\n"); 226 return -EINVAL; 227 } 228 229 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 230 prop, ARRAY_SIZE(prop)); 231 if (!ret) { 232 pl->link_config.duplex = prop[1] ? 233 DUPLEX_FULL : DUPLEX_HALF; 234 pl->link_config.speed = prop[2]; 235 if (prop[3]) 236 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 237 pl->link_config.lp_advertising); 238 if (prop[4]) 239 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 240 pl->link_config.lp_advertising); 241 } 242 } 243 244 if (pl->link_config.speed > SPEED_1000 && 245 pl->link_config.duplex != DUPLEX_FULL) 246 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", 247 pl->link_config.speed); 248 249 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 250 linkmode_copy(pl->link_config.advertising, pl->supported); 251 phylink_validate(pl, pl->supported, &pl->link_config); 252 253 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 254 pl->supported, true); 255 linkmode_zero(pl->supported); 256 phylink_set(pl->supported, MII); 257 phylink_set(pl->supported, Pause); 258 phylink_set(pl->supported, Asym_Pause); 259 phylink_set(pl->supported, Autoneg); 260 if (s) { 261 __set_bit(s->bit, pl->supported); 262 __set_bit(s->bit, pl->link_config.lp_advertising); 263 } else { 264 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", 265 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 266 pl->link_config.speed); 267 } 268 269 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 270 pl->supported); 271 272 pl->link_config.link = 1; 273 pl->link_config.an_complete = 1; 274 275 return 0; 276 } 277 278 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode) 279 { 280 struct fwnode_handle *dn; 281 const char *managed; 282 283 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 284 if (dn || fwnode_property_present(fwnode, "fixed-link")) 285 pl->cfg_link_an_mode = MLO_AN_FIXED; 286 fwnode_handle_put(dn); 287 288 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 289 strcmp(managed, "in-band-status") == 0) || 290 pl->config->ovr_an_inband) { 291 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 292 phylink_err(pl, 293 "can't use both fixed-link and in-band-status\n"); 294 return -EINVAL; 295 } 296 297 linkmode_zero(pl->supported); 298 phylink_set(pl->supported, MII); 299 phylink_set(pl->supported, Autoneg); 300 phylink_set(pl->supported, Asym_Pause); 301 phylink_set(pl->supported, Pause); 302 pl->link_config.an_enabled = true; 303 pl->cfg_link_an_mode = MLO_AN_INBAND; 304 305 switch (pl->link_config.interface) { 306 case PHY_INTERFACE_MODE_SGMII: 307 case PHY_INTERFACE_MODE_QSGMII: 308 phylink_set(pl->supported, 10baseT_Half); 309 phylink_set(pl->supported, 10baseT_Full); 310 phylink_set(pl->supported, 100baseT_Half); 311 phylink_set(pl->supported, 100baseT_Full); 312 phylink_set(pl->supported, 1000baseT_Half); 313 phylink_set(pl->supported, 1000baseT_Full); 314 break; 315 316 case PHY_INTERFACE_MODE_1000BASEX: 317 phylink_set(pl->supported, 1000baseX_Full); 318 break; 319 320 case PHY_INTERFACE_MODE_2500BASEX: 321 phylink_set(pl->supported, 2500baseX_Full); 322 break; 323 324 case PHY_INTERFACE_MODE_5GBASER: 325 phylink_set(pl->supported, 5000baseT_Full); 326 break; 327 328 case PHY_INTERFACE_MODE_25GBASER: 329 phylink_set(pl->supported, 25000baseCR_Full); 330 phylink_set(pl->supported, 25000baseKR_Full); 331 phylink_set(pl->supported, 25000baseSR_Full); 332 fallthrough; 333 case PHY_INTERFACE_MODE_USXGMII: 334 case PHY_INTERFACE_MODE_10GKR: 335 case PHY_INTERFACE_MODE_10GBASER: 336 phylink_set(pl->supported, 10baseT_Half); 337 phylink_set(pl->supported, 10baseT_Full); 338 phylink_set(pl->supported, 100baseT_Half); 339 phylink_set(pl->supported, 100baseT_Full); 340 phylink_set(pl->supported, 1000baseT_Half); 341 phylink_set(pl->supported, 1000baseT_Full); 342 phylink_set(pl->supported, 1000baseX_Full); 343 phylink_set(pl->supported, 1000baseKX_Full); 344 phylink_set(pl->supported, 2500baseT_Full); 345 phylink_set(pl->supported, 2500baseX_Full); 346 phylink_set(pl->supported, 5000baseT_Full); 347 phylink_set(pl->supported, 10000baseT_Full); 348 phylink_set(pl->supported, 10000baseKR_Full); 349 phylink_set(pl->supported, 10000baseKX4_Full); 350 phylink_set(pl->supported, 10000baseCR_Full); 351 phylink_set(pl->supported, 10000baseSR_Full); 352 phylink_set(pl->supported, 10000baseLR_Full); 353 phylink_set(pl->supported, 10000baseLRM_Full); 354 phylink_set(pl->supported, 10000baseER_Full); 355 break; 356 357 case PHY_INTERFACE_MODE_XLGMII: 358 phylink_set(pl->supported, 25000baseCR_Full); 359 phylink_set(pl->supported, 25000baseKR_Full); 360 phylink_set(pl->supported, 25000baseSR_Full); 361 phylink_set(pl->supported, 40000baseKR4_Full); 362 phylink_set(pl->supported, 40000baseCR4_Full); 363 phylink_set(pl->supported, 40000baseSR4_Full); 364 phylink_set(pl->supported, 40000baseLR4_Full); 365 phylink_set(pl->supported, 50000baseCR2_Full); 366 phylink_set(pl->supported, 50000baseKR2_Full); 367 phylink_set(pl->supported, 50000baseSR2_Full); 368 phylink_set(pl->supported, 50000baseKR_Full); 369 phylink_set(pl->supported, 50000baseSR_Full); 370 phylink_set(pl->supported, 50000baseCR_Full); 371 phylink_set(pl->supported, 50000baseLR_ER_FR_Full); 372 phylink_set(pl->supported, 50000baseDR_Full); 373 phylink_set(pl->supported, 100000baseKR4_Full); 374 phylink_set(pl->supported, 100000baseSR4_Full); 375 phylink_set(pl->supported, 100000baseCR4_Full); 376 phylink_set(pl->supported, 100000baseLR4_ER4_Full); 377 phylink_set(pl->supported, 100000baseKR2_Full); 378 phylink_set(pl->supported, 100000baseSR2_Full); 379 phylink_set(pl->supported, 100000baseCR2_Full); 380 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full); 381 phylink_set(pl->supported, 100000baseDR2_Full); 382 break; 383 384 default: 385 phylink_err(pl, 386 "incorrect link mode %s for in-band status\n", 387 phy_modes(pl->link_config.interface)); 388 return -EINVAL; 389 } 390 391 linkmode_copy(pl->link_config.advertising, pl->supported); 392 393 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 394 phylink_err(pl, 395 "failed to validate link configuration for in-band status\n"); 396 return -EINVAL; 397 } 398 399 /* Check if MAC/PCS also supports Autoneg. */ 400 pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg); 401 } 402 403 return 0; 404 } 405 406 static void phylink_apply_manual_flow(struct phylink *pl, 407 struct phylink_link_state *state) 408 { 409 /* If autoneg is disabled, pause AN is also disabled */ 410 if (!state->an_enabled) 411 state->pause &= ~MLO_PAUSE_AN; 412 413 /* Manual configuration of pause modes */ 414 if (!(pl->link_config.pause & MLO_PAUSE_AN)) 415 state->pause = pl->link_config.pause; 416 } 417 418 static void phylink_resolve_flow(struct phylink_link_state *state) 419 { 420 bool tx_pause, rx_pause; 421 422 state->pause = MLO_PAUSE_NONE; 423 if (state->duplex == DUPLEX_FULL) { 424 linkmode_resolve_pause(state->advertising, 425 state->lp_advertising, 426 &tx_pause, &rx_pause); 427 if (tx_pause) 428 state->pause |= MLO_PAUSE_TX; 429 if (rx_pause) 430 state->pause |= MLO_PAUSE_RX; 431 } 432 } 433 434 static void phylink_mac_config(struct phylink *pl, 435 const struct phylink_link_state *state) 436 { 437 phylink_dbg(pl, 438 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n", 439 __func__, phylink_an_mode_str(pl->cur_link_an_mode), 440 phy_modes(state->interface), 441 phy_speed_to_str(state->speed), 442 phy_duplex_to_str(state->duplex), 443 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising, 444 state->pause, state->link, state->an_enabled); 445 446 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state); 447 } 448 449 static void phylink_mac_pcs_an_restart(struct phylink *pl) 450 { 451 if (pl->link_config.an_enabled && 452 phy_interface_mode_is_8023z(pl->link_config.interface) && 453 phylink_autoneg_inband(pl->cur_link_an_mode)) { 454 if (pl->pcs_ops) 455 pl->pcs_ops->pcs_an_restart(pl->pcs); 456 else 457 pl->mac_ops->mac_an_restart(pl->config); 458 } 459 } 460 461 static void phylink_major_config(struct phylink *pl, bool restart, 462 const struct phylink_link_state *state) 463 { 464 int err; 465 466 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); 467 468 if (pl->mac_ops->mac_prepare) { 469 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode, 470 state->interface); 471 if (err < 0) { 472 phylink_err(pl, "mac_prepare failed: %pe\n", 473 ERR_PTR(err)); 474 return; 475 } 476 } 477 478 phylink_mac_config(pl, state); 479 480 if (pl->pcs_ops) { 481 err = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, 482 state->interface, 483 state->advertising, 484 !!(pl->link_config.pause & 485 MLO_PAUSE_AN)); 486 if (err < 0) 487 phylink_err(pl, "pcs_config failed: %pe\n", 488 ERR_PTR(err)); 489 if (err > 0) 490 restart = true; 491 } 492 if (restart) 493 phylink_mac_pcs_an_restart(pl); 494 495 if (pl->mac_ops->mac_finish) { 496 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode, 497 state->interface); 498 if (err < 0) 499 phylink_err(pl, "mac_finish failed: %pe\n", 500 ERR_PTR(err)); 501 } 502 } 503 504 /* 505 * Reconfigure for a change of inband advertisement. 506 * If we have a separate PCS, we only need to call its pcs_config() method, 507 * and then restart AN if it indicates something changed. Otherwise, we do 508 * the full MAC reconfiguration. 509 */ 510 static int phylink_change_inband_advert(struct phylink *pl) 511 { 512 int ret; 513 514 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 515 return 0; 516 517 if (!pl->pcs_ops) { 518 /* Legacy method */ 519 phylink_mac_config(pl, &pl->link_config); 520 phylink_mac_pcs_an_restart(pl); 521 return 0; 522 } 523 524 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 525 phylink_an_mode_str(pl->cur_link_an_mode), 526 phy_modes(pl->link_config.interface), 527 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 528 pl->link_config.pause); 529 530 /* Modern PCS-based method; update the advert at the PCS, and 531 * restart negotiation if the pcs_config() helper indicates that 532 * the programmed advertisement has changed. 533 */ 534 ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, 535 pl->link_config.interface, 536 pl->link_config.advertising, 537 !!(pl->link_config.pause & MLO_PAUSE_AN)); 538 if (ret < 0) 539 return ret; 540 541 if (ret > 0) 542 phylink_mac_pcs_an_restart(pl); 543 544 return 0; 545 } 546 547 static void phylink_mac_pcs_get_state(struct phylink *pl, 548 struct phylink_link_state *state) 549 { 550 linkmode_copy(state->advertising, pl->link_config.advertising); 551 linkmode_zero(state->lp_advertising); 552 state->interface = pl->link_config.interface; 553 state->an_enabled = pl->link_config.an_enabled; 554 if (state->an_enabled) { 555 state->speed = SPEED_UNKNOWN; 556 state->duplex = DUPLEX_UNKNOWN; 557 state->pause = MLO_PAUSE_NONE; 558 } else { 559 state->speed = pl->link_config.speed; 560 state->duplex = pl->link_config.duplex; 561 state->pause = pl->link_config.pause; 562 } 563 state->an_complete = 0; 564 state->link = 1; 565 566 if (pl->pcs_ops) 567 pl->pcs_ops->pcs_get_state(pl->pcs, state); 568 else if (pl->mac_ops->mac_pcs_get_state) 569 pl->mac_ops->mac_pcs_get_state(pl->config, state); 570 else 571 state->link = 0; 572 } 573 574 /* The fixed state is... fixed except for the link state, 575 * which may be determined by a GPIO or a callback. 576 */ 577 static void phylink_get_fixed_state(struct phylink *pl, 578 struct phylink_link_state *state) 579 { 580 *state = pl->link_config; 581 if (pl->config->get_fixed_state) 582 pl->config->get_fixed_state(pl->config, state); 583 else if (pl->link_gpio) 584 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 585 586 phylink_resolve_flow(state); 587 } 588 589 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 590 { 591 struct phylink_link_state link_state; 592 593 switch (pl->cur_link_an_mode) { 594 case MLO_AN_PHY: 595 link_state = pl->phy_state; 596 break; 597 598 case MLO_AN_FIXED: 599 phylink_get_fixed_state(pl, &link_state); 600 break; 601 602 case MLO_AN_INBAND: 603 link_state = pl->link_config; 604 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 605 link_state.pause = MLO_PAUSE_NONE; 606 break; 607 608 default: /* can't happen */ 609 return; 610 } 611 612 link_state.link = false; 613 614 phylink_apply_manual_flow(pl, &link_state); 615 phylink_major_config(pl, force_restart, &link_state); 616 } 617 618 static const char *phylink_pause_to_str(int pause) 619 { 620 switch (pause & MLO_PAUSE_TXRX_MASK) { 621 case MLO_PAUSE_TX | MLO_PAUSE_RX: 622 return "rx/tx"; 623 case MLO_PAUSE_TX: 624 return "tx"; 625 case MLO_PAUSE_RX: 626 return "rx"; 627 default: 628 return "off"; 629 } 630 } 631 632 static void phylink_link_up(struct phylink *pl, 633 struct phylink_link_state link_state) 634 { 635 struct net_device *ndev = pl->netdev; 636 637 pl->cur_interface = link_state.interface; 638 639 if (pl->pcs_ops && pl->pcs_ops->pcs_link_up) 640 pl->pcs_ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode, 641 pl->cur_interface, 642 link_state.speed, link_state.duplex); 643 644 pl->mac_ops->mac_link_up(pl->config, pl->phydev, 645 pl->cur_link_an_mode, pl->cur_interface, 646 link_state.speed, link_state.duplex, 647 !!(link_state.pause & MLO_PAUSE_TX), 648 !!(link_state.pause & MLO_PAUSE_RX)); 649 650 if (ndev) 651 netif_carrier_on(ndev); 652 653 phylink_info(pl, 654 "Link is Up - %s/%s - flow control %s\n", 655 phy_speed_to_str(link_state.speed), 656 phy_duplex_to_str(link_state.duplex), 657 phylink_pause_to_str(link_state.pause)); 658 } 659 660 static void phylink_link_down(struct phylink *pl) 661 { 662 struct net_device *ndev = pl->netdev; 663 664 if (ndev) 665 netif_carrier_off(ndev); 666 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode, 667 pl->cur_interface); 668 phylink_info(pl, "Link is Down\n"); 669 } 670 671 static void phylink_resolve(struct work_struct *w) 672 { 673 struct phylink *pl = container_of(w, struct phylink, resolve); 674 struct phylink_link_state link_state; 675 struct net_device *ndev = pl->netdev; 676 bool mac_config = false; 677 bool cur_link_state; 678 679 mutex_lock(&pl->state_mutex); 680 if (pl->netdev) 681 cur_link_state = netif_carrier_ok(ndev); 682 else 683 cur_link_state = pl->old_link_state; 684 685 if (pl->phylink_disable_state) { 686 pl->mac_link_dropped = false; 687 link_state.link = false; 688 } else if (pl->mac_link_dropped) { 689 link_state.link = false; 690 } else { 691 switch (pl->cur_link_an_mode) { 692 case MLO_AN_PHY: 693 link_state = pl->phy_state; 694 phylink_apply_manual_flow(pl, &link_state); 695 mac_config = link_state.link; 696 break; 697 698 case MLO_AN_FIXED: 699 phylink_get_fixed_state(pl, &link_state); 700 mac_config = link_state.link; 701 break; 702 703 case MLO_AN_INBAND: 704 phylink_mac_pcs_get_state(pl, &link_state); 705 706 /* If we have a phy, the "up" state is the union of 707 * both the PHY and the MAC 708 */ 709 if (pl->phydev) 710 link_state.link &= pl->phy_state.link; 711 712 /* Only update if the PHY link is up */ 713 if (pl->phydev && pl->phy_state.link) { 714 link_state.interface = pl->phy_state.interface; 715 716 /* If we have a PHY, we need to update with 717 * the PHY flow control bits. 718 */ 719 link_state.pause = pl->phy_state.pause; 720 mac_config = true; 721 } 722 phylink_apply_manual_flow(pl, &link_state); 723 break; 724 } 725 } 726 727 if (mac_config) { 728 if (link_state.interface != pl->link_config.interface) { 729 /* The interface has changed, force the link down and 730 * then reconfigure. 731 */ 732 if (cur_link_state) { 733 phylink_link_down(pl); 734 cur_link_state = false; 735 } 736 phylink_major_config(pl, false, &link_state); 737 pl->link_config.interface = link_state.interface; 738 } else if (!pl->pcs_ops) { 739 /* The interface remains unchanged, only the speed, 740 * duplex or pause settings have changed. Call the 741 * old mac_config() method to configure the MAC/PCS 742 * only if we do not have a PCS installed (an 743 * unconverted user.) 744 */ 745 phylink_mac_config(pl, &link_state); 746 } 747 } 748 749 if (link_state.link != cur_link_state) { 750 pl->old_link_state = link_state.link; 751 if (!link_state.link) 752 phylink_link_down(pl); 753 else 754 phylink_link_up(pl, link_state); 755 } 756 if (!link_state.link && pl->mac_link_dropped) { 757 pl->mac_link_dropped = false; 758 queue_work(system_power_efficient_wq, &pl->resolve); 759 } 760 mutex_unlock(&pl->state_mutex); 761 } 762 763 static void phylink_run_resolve(struct phylink *pl) 764 { 765 if (!pl->phylink_disable_state) 766 queue_work(system_power_efficient_wq, &pl->resolve); 767 } 768 769 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 770 { 771 unsigned long state = pl->phylink_disable_state; 772 773 set_bit(bit, &pl->phylink_disable_state); 774 if (state == 0) { 775 queue_work(system_power_efficient_wq, &pl->resolve); 776 flush_work(&pl->resolve); 777 } 778 } 779 780 static void phylink_fixed_poll(struct timer_list *t) 781 { 782 struct phylink *pl = container_of(t, struct phylink, link_poll); 783 784 mod_timer(t, jiffies + HZ); 785 786 phylink_run_resolve(pl); 787 } 788 789 static const struct sfp_upstream_ops sfp_phylink_ops; 790 791 static int phylink_register_sfp(struct phylink *pl, 792 struct fwnode_handle *fwnode) 793 { 794 struct sfp_bus *bus; 795 int ret; 796 797 if (!fwnode) 798 return 0; 799 800 bus = sfp_bus_find_fwnode(fwnode); 801 if (IS_ERR(bus)) { 802 ret = PTR_ERR(bus); 803 phylink_err(pl, "unable to attach SFP bus: %d\n", ret); 804 return ret; 805 } 806 807 pl->sfp_bus = bus; 808 809 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 810 sfp_bus_put(bus); 811 812 return ret; 813 } 814 815 /** 816 * phylink_create() - create a phylink instance 817 * @config: a pointer to the target &struct phylink_config 818 * @fwnode: a pointer to a &struct fwnode_handle describing the network 819 * interface 820 * @iface: the desired link mode defined by &typedef phy_interface_t 821 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 822 * 823 * Create a new phylink instance, and parse the link parameters found in @np. 824 * This will parse in-band modes, fixed-link or SFP configuration. 825 * 826 * Note: the rtnl lock must not be held when calling this function. 827 * 828 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 829 * must use IS_ERR() to check for errors from this function. 830 */ 831 struct phylink *phylink_create(struct phylink_config *config, 832 struct fwnode_handle *fwnode, 833 phy_interface_t iface, 834 const struct phylink_mac_ops *mac_ops) 835 { 836 struct phylink *pl; 837 int ret; 838 839 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 840 if (!pl) 841 return ERR_PTR(-ENOMEM); 842 843 mutex_init(&pl->state_mutex); 844 INIT_WORK(&pl->resolve, phylink_resolve); 845 846 pl->config = config; 847 if (config->type == PHYLINK_NETDEV) { 848 pl->netdev = to_net_dev(config->dev); 849 } else if (config->type == PHYLINK_DEV) { 850 pl->dev = config->dev; 851 } else { 852 kfree(pl); 853 return ERR_PTR(-EINVAL); 854 } 855 856 pl->phy_state.interface = iface; 857 pl->link_interface = iface; 858 if (iface == PHY_INTERFACE_MODE_MOCA) 859 pl->link_port = PORT_BNC; 860 else 861 pl->link_port = PORT_MII; 862 pl->link_config.interface = iface; 863 pl->link_config.pause = MLO_PAUSE_AN; 864 pl->link_config.speed = SPEED_UNKNOWN; 865 pl->link_config.duplex = DUPLEX_UNKNOWN; 866 pl->link_config.an_enabled = true; 867 pl->mac_ops = mac_ops; 868 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 869 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 870 871 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 872 linkmode_copy(pl->link_config.advertising, pl->supported); 873 phylink_validate(pl, pl->supported, &pl->link_config); 874 875 ret = phylink_parse_mode(pl, fwnode); 876 if (ret < 0) { 877 kfree(pl); 878 return ERR_PTR(ret); 879 } 880 881 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 882 ret = phylink_parse_fixedlink(pl, fwnode); 883 if (ret < 0) { 884 kfree(pl); 885 return ERR_PTR(ret); 886 } 887 } 888 889 pl->cur_link_an_mode = pl->cfg_link_an_mode; 890 891 ret = phylink_register_sfp(pl, fwnode); 892 if (ret < 0) { 893 kfree(pl); 894 return ERR_PTR(ret); 895 } 896 897 return pl; 898 } 899 EXPORT_SYMBOL_GPL(phylink_create); 900 901 /** 902 * phylink_set_pcs() - set the current PCS for phylink to use 903 * @pl: a pointer to a &struct phylink returned from phylink_create() 904 * @pcs: a pointer to the &struct phylink_pcs 905 * 906 * Bind the MAC PCS to phylink. This may be called after phylink_create(), 907 * in mac_prepare() or mac_config() methods if it is desired to dynamically 908 * change the PCS. 909 * 910 * Please note that there are behavioural changes with the mac_config() 911 * callback if a PCS is present (denoting a newer setup) so removing a PCS 912 * is not supported, and if a PCS is going to be used, it must be registered 913 * by calling phylink_set_pcs() at the latest in the first mac_config() call. 914 */ 915 void phylink_set_pcs(struct phylink *pl, struct phylink_pcs *pcs) 916 { 917 pl->pcs = pcs; 918 pl->pcs_ops = pcs->ops; 919 } 920 EXPORT_SYMBOL_GPL(phylink_set_pcs); 921 922 /** 923 * phylink_destroy() - cleanup and destroy the phylink instance 924 * @pl: a pointer to a &struct phylink returned from phylink_create() 925 * 926 * Destroy a phylink instance. Any PHY that has been attached must have been 927 * cleaned up via phylink_disconnect_phy() prior to calling this function. 928 * 929 * Note: the rtnl lock must not be held when calling this function. 930 */ 931 void phylink_destroy(struct phylink *pl) 932 { 933 sfp_bus_del_upstream(pl->sfp_bus); 934 if (pl->link_gpio) 935 gpiod_put(pl->link_gpio); 936 937 cancel_work_sync(&pl->resolve); 938 kfree(pl); 939 } 940 EXPORT_SYMBOL_GPL(phylink_destroy); 941 942 static void phylink_phy_change(struct phy_device *phydev, bool up) 943 { 944 struct phylink *pl = phydev->phylink; 945 bool tx_pause, rx_pause; 946 947 phy_get_pause(phydev, &tx_pause, &rx_pause); 948 949 mutex_lock(&pl->state_mutex); 950 pl->phy_state.speed = phydev->speed; 951 pl->phy_state.duplex = phydev->duplex; 952 pl->phy_state.pause = MLO_PAUSE_NONE; 953 if (tx_pause) 954 pl->phy_state.pause |= MLO_PAUSE_TX; 955 if (rx_pause) 956 pl->phy_state.pause |= MLO_PAUSE_RX; 957 pl->phy_state.interface = phydev->interface; 958 pl->phy_state.link = up; 959 mutex_unlock(&pl->state_mutex); 960 961 phylink_run_resolve(pl); 962 963 phylink_dbg(pl, "phy link %s %s/%s/%s/%s\n", up ? "up" : "down", 964 phy_modes(phydev->interface), 965 phy_speed_to_str(phydev->speed), 966 phy_duplex_to_str(phydev->duplex), 967 phylink_pause_to_str(pl->phy_state.pause)); 968 } 969 970 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 971 phy_interface_t interface) 972 { 973 struct phylink_link_state config; 974 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 975 char *irq_str; 976 int ret; 977 978 /* 979 * This is the new way of dealing with flow control for PHYs, 980 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 981 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 982 * using our validate call to the MAC, we rely upon the MAC 983 * clearing the bits from both supported and advertising fields. 984 */ 985 phy_support_asym_pause(phy); 986 987 memset(&config, 0, sizeof(config)); 988 linkmode_copy(supported, phy->supported); 989 linkmode_copy(config.advertising, phy->advertising); 990 991 /* Clause 45 PHYs switch their Serdes lane between several different 992 * modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G 993 * speeds. We really need to know which interface modes the PHY and 994 * MAC supports to properly work out which linkmodes can be supported. 995 */ 996 if (phy->is_c45 && 997 interface != PHY_INTERFACE_MODE_RXAUI && 998 interface != PHY_INTERFACE_MODE_XAUI && 999 interface != PHY_INTERFACE_MODE_USXGMII) 1000 config.interface = PHY_INTERFACE_MODE_NA; 1001 else 1002 config.interface = interface; 1003 1004 ret = phylink_validate(pl, supported, &config); 1005 if (ret) { 1006 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %d\n", 1007 phy_modes(config.interface), 1008 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 1009 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 1010 ret); 1011 return ret; 1012 } 1013 1014 phy->phylink = pl; 1015 phy->phy_link_change = phylink_phy_change; 1016 1017 irq_str = phy_attached_info_irq(phy); 1018 phylink_info(pl, 1019 "PHY [%s] driver [%s] (irq=%s)\n", 1020 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 1021 kfree(irq_str); 1022 1023 mutex_lock(&phy->lock); 1024 mutex_lock(&pl->state_mutex); 1025 pl->phydev = phy; 1026 pl->phy_state.interface = interface; 1027 pl->phy_state.pause = MLO_PAUSE_NONE; 1028 pl->phy_state.speed = SPEED_UNKNOWN; 1029 pl->phy_state.duplex = DUPLEX_UNKNOWN; 1030 linkmode_copy(pl->supported, supported); 1031 linkmode_copy(pl->link_config.advertising, config.advertising); 1032 1033 /* Restrict the phy advertisement according to the MAC support. */ 1034 linkmode_copy(phy->advertising, config.advertising); 1035 mutex_unlock(&pl->state_mutex); 1036 mutex_unlock(&phy->lock); 1037 1038 phylink_dbg(pl, 1039 "phy: setting supported %*pb advertising %*pb\n", 1040 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 1041 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 1042 1043 if (phy_interrupt_is_valid(phy)) 1044 phy_request_interrupt(phy); 1045 1046 return 0; 1047 } 1048 1049 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 1050 phy_interface_t interface) 1051 { 1052 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 1053 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1054 phy_interface_mode_is_8023z(interface)))) 1055 return -EINVAL; 1056 1057 if (pl->phydev) 1058 return -EBUSY; 1059 1060 return phy_attach_direct(pl->netdev, phy, 0, interface); 1061 } 1062 1063 /** 1064 * phylink_connect_phy() - connect a PHY to the phylink instance 1065 * @pl: a pointer to a &struct phylink returned from phylink_create() 1066 * @phy: a pointer to a &struct phy_device. 1067 * 1068 * Connect @phy to the phylink instance specified by @pl by calling 1069 * phy_attach_direct(). Configure the @phy according to the MAC driver's 1070 * capabilities, start the PHYLIB state machine and enable any interrupts 1071 * that the PHY supports. 1072 * 1073 * This updates the phylink's ethtool supported and advertising link mode 1074 * masks. 1075 * 1076 * Returns 0 on success or a negative errno. 1077 */ 1078 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 1079 { 1080 int ret; 1081 1082 /* Use PHY device/driver interface */ 1083 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 1084 pl->link_interface = phy->interface; 1085 pl->link_config.interface = pl->link_interface; 1086 } 1087 1088 ret = phylink_attach_phy(pl, phy, pl->link_interface); 1089 if (ret < 0) 1090 return ret; 1091 1092 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 1093 if (ret) 1094 phy_detach(phy); 1095 1096 return ret; 1097 } 1098 EXPORT_SYMBOL_GPL(phylink_connect_phy); 1099 1100 /** 1101 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 1102 * @pl: a pointer to a &struct phylink returned from phylink_create() 1103 * @dn: a pointer to a &struct device_node. 1104 * @flags: PHY-specific flags to communicate to the PHY device driver 1105 * 1106 * Connect the phy specified in the device node @dn to the phylink instance 1107 * specified by @pl. Actions specified in phylink_connect_phy() will be 1108 * performed. 1109 * 1110 * Returns 0 on success or a negative errno. 1111 */ 1112 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 1113 u32 flags) 1114 { 1115 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 1116 } 1117 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 1118 1119 /** 1120 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 1121 * @pl: a pointer to a &struct phylink returned from phylink_create() 1122 * @fwnode: a pointer to a &struct fwnode_handle. 1123 * @flags: PHY-specific flags to communicate to the PHY device driver 1124 * 1125 * Connect the phy specified @fwnode to the phylink instance specified 1126 * by @pl. 1127 * 1128 * Returns 0 on success or a negative errno. 1129 */ 1130 int phylink_fwnode_phy_connect(struct phylink *pl, 1131 struct fwnode_handle *fwnode, 1132 u32 flags) 1133 { 1134 struct fwnode_handle *phy_fwnode; 1135 struct phy_device *phy_dev; 1136 int ret; 1137 1138 /* Fixed links and 802.3z are handled without needing a PHY */ 1139 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1140 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1141 phy_interface_mode_is_8023z(pl->link_interface))) 1142 return 0; 1143 1144 phy_fwnode = fwnode_get_phy_node(fwnode); 1145 if (IS_ERR(phy_fwnode)) { 1146 if (pl->cfg_link_an_mode == MLO_AN_PHY) 1147 return -ENODEV; 1148 return 0; 1149 } 1150 1151 phy_dev = fwnode_phy_find_device(phy_fwnode); 1152 /* We're done with the phy_node handle */ 1153 fwnode_handle_put(phy_fwnode); 1154 if (!phy_dev) 1155 return -ENODEV; 1156 1157 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 1158 pl->link_interface); 1159 if (ret) { 1160 phy_device_free(phy_dev); 1161 return ret; 1162 } 1163 1164 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 1165 if (ret) 1166 phy_detach(phy_dev); 1167 1168 return ret; 1169 } 1170 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 1171 1172 /** 1173 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 1174 * instance. 1175 * @pl: a pointer to a &struct phylink returned from phylink_create() 1176 * 1177 * Disconnect any current PHY from the phylink instance described by @pl. 1178 */ 1179 void phylink_disconnect_phy(struct phylink *pl) 1180 { 1181 struct phy_device *phy; 1182 1183 ASSERT_RTNL(); 1184 1185 phy = pl->phydev; 1186 if (phy) { 1187 mutex_lock(&phy->lock); 1188 mutex_lock(&pl->state_mutex); 1189 pl->phydev = NULL; 1190 mutex_unlock(&pl->state_mutex); 1191 mutex_unlock(&phy->lock); 1192 flush_work(&pl->resolve); 1193 1194 phy_disconnect(phy); 1195 } 1196 } 1197 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 1198 1199 /** 1200 * phylink_mac_change() - notify phylink of a change in MAC state 1201 * @pl: a pointer to a &struct phylink returned from phylink_create() 1202 * @up: indicates whether the link is currently up. 1203 * 1204 * The MAC driver should call this driver when the state of its link 1205 * changes (eg, link failure, new negotiation results, etc.) 1206 */ 1207 void phylink_mac_change(struct phylink *pl, bool up) 1208 { 1209 if (!up) 1210 pl->mac_link_dropped = true; 1211 phylink_run_resolve(pl); 1212 phylink_dbg(pl, "mac link %s\n", up ? "up" : "down"); 1213 } 1214 EXPORT_SYMBOL_GPL(phylink_mac_change); 1215 1216 static irqreturn_t phylink_link_handler(int irq, void *data) 1217 { 1218 struct phylink *pl = data; 1219 1220 phylink_run_resolve(pl); 1221 1222 return IRQ_HANDLED; 1223 } 1224 1225 /** 1226 * phylink_start() - start a phylink instance 1227 * @pl: a pointer to a &struct phylink returned from phylink_create() 1228 * 1229 * Start the phylink instance specified by @pl, configuring the MAC for the 1230 * desired link mode(s) and negotiation style. This should be called from the 1231 * network device driver's &struct net_device_ops ndo_open() method. 1232 */ 1233 void phylink_start(struct phylink *pl) 1234 { 1235 bool poll = false; 1236 1237 ASSERT_RTNL(); 1238 1239 phylink_info(pl, "configuring for %s/%s link mode\n", 1240 phylink_an_mode_str(pl->cur_link_an_mode), 1241 phy_modes(pl->link_config.interface)); 1242 1243 /* Always set the carrier off */ 1244 if (pl->netdev) 1245 netif_carrier_off(pl->netdev); 1246 1247 /* Apply the link configuration to the MAC when starting. This allows 1248 * a fixed-link to start with the correct parameters, and also 1249 * ensures that we set the appropriate advertisement for Serdes links. 1250 * 1251 * Restart autonegotiation if using 802.3z to ensure that the link 1252 * parameters are properly negotiated. This is necessary for DSA 1253 * switches using 802.3z negotiation to ensure they see our modes. 1254 */ 1255 phylink_mac_initial_config(pl, true); 1256 1257 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1258 phylink_run_resolve(pl); 1259 1260 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 1261 int irq = gpiod_to_irq(pl->link_gpio); 1262 1263 if (irq > 0) { 1264 if (!request_irq(irq, phylink_link_handler, 1265 IRQF_TRIGGER_RISING | 1266 IRQF_TRIGGER_FALLING, 1267 "netdev link", pl)) 1268 pl->link_irq = irq; 1269 else 1270 irq = 0; 1271 } 1272 if (irq <= 0) 1273 poll = true; 1274 } 1275 1276 switch (pl->cfg_link_an_mode) { 1277 case MLO_AN_FIXED: 1278 poll |= pl->config->poll_fixed_state; 1279 break; 1280 case MLO_AN_INBAND: 1281 poll |= pl->config->pcs_poll; 1282 if (pl->pcs) 1283 poll |= pl->pcs->poll; 1284 break; 1285 } 1286 if (poll) 1287 mod_timer(&pl->link_poll, jiffies + HZ); 1288 if (pl->phydev) 1289 phy_start(pl->phydev); 1290 if (pl->sfp_bus) 1291 sfp_upstream_start(pl->sfp_bus); 1292 } 1293 EXPORT_SYMBOL_GPL(phylink_start); 1294 1295 /** 1296 * phylink_stop() - stop a phylink instance 1297 * @pl: a pointer to a &struct phylink returned from phylink_create() 1298 * 1299 * Stop the phylink instance specified by @pl. This should be called from the 1300 * network device driver's &struct net_device_ops ndo_stop() method. The 1301 * network device's carrier state should not be changed prior to calling this 1302 * function. 1303 * 1304 * This will synchronously bring down the link if the link is not already 1305 * down (in other words, it will trigger a mac_link_down() method call.) 1306 */ 1307 void phylink_stop(struct phylink *pl) 1308 { 1309 ASSERT_RTNL(); 1310 1311 if (pl->sfp_bus) 1312 sfp_upstream_stop(pl->sfp_bus); 1313 if (pl->phydev) 1314 phy_stop(pl->phydev); 1315 del_timer_sync(&pl->link_poll); 1316 if (pl->link_irq) { 1317 free_irq(pl->link_irq, pl); 1318 pl->link_irq = 0; 1319 } 1320 1321 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 1322 } 1323 EXPORT_SYMBOL_GPL(phylink_stop); 1324 1325 /** 1326 * phylink_suspend() - handle a network device suspend event 1327 * @pl: a pointer to a &struct phylink returned from phylink_create() 1328 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan 1329 * 1330 * Handle a network device suspend event. There are several cases: 1331 * - If Wake-on-Lan is not active, we can bring down the link between 1332 * the MAC and PHY by calling phylink_stop(). 1333 * - If Wake-on-Lan is active, and being handled only by the PHY, we 1334 * can also bring down the link between the MAC and PHY. 1335 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC 1336 * still needs to receive packets, so we can not bring the link down. 1337 */ 1338 void phylink_suspend(struct phylink *pl, bool mac_wol) 1339 { 1340 ASSERT_RTNL(); 1341 1342 if (mac_wol && (!pl->netdev || pl->netdev->wol_enabled)) { 1343 /* Wake-on-Lan enabled, MAC handling */ 1344 mutex_lock(&pl->state_mutex); 1345 1346 /* Stop the resolver bringing the link up */ 1347 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 1348 1349 /* Disable the carrier, to prevent transmit timeouts, 1350 * but one would hope all packets have been sent. This 1351 * also means phylink_resolve() will do nothing. 1352 */ 1353 if (pl->netdev) 1354 netif_carrier_off(pl->netdev); 1355 else 1356 pl->old_link_state = false; 1357 1358 /* We do not call mac_link_down() here as we want the 1359 * link to remain up to receive the WoL packets. 1360 */ 1361 mutex_unlock(&pl->state_mutex); 1362 } else { 1363 phylink_stop(pl); 1364 } 1365 } 1366 EXPORT_SYMBOL_GPL(phylink_suspend); 1367 1368 /** 1369 * phylink_resume() - handle a network device resume event 1370 * @pl: a pointer to a &struct phylink returned from phylink_create() 1371 * 1372 * Undo the effects of phylink_suspend(), returning the link to an 1373 * operational state. 1374 */ 1375 void phylink_resume(struct phylink *pl) 1376 { 1377 ASSERT_RTNL(); 1378 1379 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { 1380 /* Wake-on-Lan enabled, MAC handling */ 1381 1382 /* Call mac_link_down() so we keep the overall state balanced. 1383 * Do this under the state_mutex lock for consistency. This 1384 * will cause a "Link Down" message to be printed during 1385 * resume, which is harmless - the true link state will be 1386 * printed when we run a resolve. 1387 */ 1388 mutex_lock(&pl->state_mutex); 1389 phylink_link_down(pl); 1390 mutex_unlock(&pl->state_mutex); 1391 1392 /* Re-apply the link parameters so that all the settings get 1393 * restored to the MAC. 1394 */ 1395 phylink_mac_initial_config(pl, true); 1396 1397 /* Re-enable and re-resolve the link parameters */ 1398 clear_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 1399 phylink_run_resolve(pl); 1400 } else { 1401 phylink_start(pl); 1402 } 1403 } 1404 EXPORT_SYMBOL_GPL(phylink_resume); 1405 1406 /** 1407 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 1408 * @pl: a pointer to a &struct phylink returned from phylink_create() 1409 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 1410 * 1411 * Read the wake on lan parameters from the PHY attached to the phylink 1412 * instance specified by @pl. If no PHY is currently attached, report no 1413 * support for wake on lan. 1414 */ 1415 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 1416 { 1417 ASSERT_RTNL(); 1418 1419 wol->supported = 0; 1420 wol->wolopts = 0; 1421 1422 if (pl->phydev) 1423 phy_ethtool_get_wol(pl->phydev, wol); 1424 } 1425 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 1426 1427 /** 1428 * phylink_ethtool_set_wol() - set wake on lan parameters 1429 * @pl: a pointer to a &struct phylink returned from phylink_create() 1430 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 1431 * 1432 * Set the wake on lan parameters for the PHY attached to the phylink 1433 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 1434 * error. 1435 * 1436 * Returns zero on success or negative errno code. 1437 */ 1438 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 1439 { 1440 int ret = -EOPNOTSUPP; 1441 1442 ASSERT_RTNL(); 1443 1444 if (pl->phydev) 1445 ret = phy_ethtool_set_wol(pl->phydev, wol); 1446 1447 return ret; 1448 } 1449 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 1450 1451 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 1452 { 1453 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 1454 1455 linkmode_zero(mask); 1456 phylink_set_port_modes(mask); 1457 1458 linkmode_and(dst, dst, mask); 1459 linkmode_or(dst, dst, b); 1460 } 1461 1462 static void phylink_get_ksettings(const struct phylink_link_state *state, 1463 struct ethtool_link_ksettings *kset) 1464 { 1465 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 1466 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 1467 kset->base.speed = state->speed; 1468 kset->base.duplex = state->duplex; 1469 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE : 1470 AUTONEG_DISABLE; 1471 } 1472 1473 /** 1474 * phylink_ethtool_ksettings_get() - get the current link settings 1475 * @pl: a pointer to a &struct phylink returned from phylink_create() 1476 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 1477 * 1478 * Read the current link settings for the phylink instance specified by @pl. 1479 * This will be the link settings read from the MAC, PHY or fixed link 1480 * settings depending on the current negotiation mode. 1481 */ 1482 int phylink_ethtool_ksettings_get(struct phylink *pl, 1483 struct ethtool_link_ksettings *kset) 1484 { 1485 struct phylink_link_state link_state; 1486 1487 ASSERT_RTNL(); 1488 1489 if (pl->phydev) 1490 phy_ethtool_ksettings_get(pl->phydev, kset); 1491 else 1492 kset->base.port = pl->link_port; 1493 1494 linkmode_copy(kset->link_modes.supported, pl->supported); 1495 1496 switch (pl->cur_link_an_mode) { 1497 case MLO_AN_FIXED: 1498 /* We are using fixed settings. Report these as the 1499 * current link settings - and note that these also 1500 * represent the supported speeds/duplex/pause modes. 1501 */ 1502 phylink_get_fixed_state(pl, &link_state); 1503 phylink_get_ksettings(&link_state, kset); 1504 break; 1505 1506 case MLO_AN_INBAND: 1507 /* If there is a phy attached, then use the reported 1508 * settings from the phy with no modification. 1509 */ 1510 if (pl->phydev) 1511 break; 1512 1513 phylink_mac_pcs_get_state(pl, &link_state); 1514 1515 /* The MAC is reporting the link results from its own PCS 1516 * layer via in-band status. Report these as the current 1517 * link settings. 1518 */ 1519 phylink_get_ksettings(&link_state, kset); 1520 break; 1521 } 1522 1523 return 0; 1524 } 1525 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 1526 1527 /** 1528 * phylink_ethtool_ksettings_set() - set the link settings 1529 * @pl: a pointer to a &struct phylink returned from phylink_create() 1530 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 1531 */ 1532 int phylink_ethtool_ksettings_set(struct phylink *pl, 1533 const struct ethtool_link_ksettings *kset) 1534 { 1535 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 1536 struct phylink_link_state config; 1537 const struct phy_setting *s; 1538 1539 ASSERT_RTNL(); 1540 1541 if (pl->phydev) { 1542 /* We can rely on phylib for this update; we also do not need 1543 * to update the pl->link_config settings: 1544 * - the configuration returned via ksettings_get() will come 1545 * from phylib whenever a PHY is present. 1546 * - link_config.interface will be updated by the PHY calling 1547 * back via phylink_phy_change() and a subsequent resolve. 1548 * - initial link configuration for PHY mode comes from the 1549 * last phy state updated via phylink_phy_change(). 1550 * - other configuration changes (e.g. pause modes) are 1551 * performed directly via phylib. 1552 * - if in in-band mode with a PHY, the link configuration 1553 * is passed on the link from the PHY, and all of 1554 * link_config.{speed,duplex,an_enabled,pause} are not used. 1555 * - the only possible use would be link_config.advertising 1556 * pause modes when in 1000base-X mode with a PHY, but in 1557 * the presence of a PHY, this should not be changed as that 1558 * should be determined from the media side advertisement. 1559 */ 1560 return phy_ethtool_ksettings_set(pl->phydev, kset); 1561 } 1562 1563 config = pl->link_config; 1564 1565 /* Mask out unsupported advertisements */ 1566 linkmode_and(config.advertising, kset->link_modes.advertising, 1567 pl->supported); 1568 1569 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 1570 switch (kset->base.autoneg) { 1571 case AUTONEG_DISABLE: 1572 /* Autonegotiation disabled, select a suitable speed and 1573 * duplex. 1574 */ 1575 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 1576 pl->supported, false); 1577 if (!s) 1578 return -EINVAL; 1579 1580 /* If we have a fixed link, refuse to change link parameters. 1581 * If the link parameters match, accept them but do nothing. 1582 */ 1583 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 1584 if (s->speed != pl->link_config.speed || 1585 s->duplex != pl->link_config.duplex) 1586 return -EINVAL; 1587 return 0; 1588 } 1589 1590 config.speed = s->speed; 1591 config.duplex = s->duplex; 1592 break; 1593 1594 case AUTONEG_ENABLE: 1595 /* If we have a fixed link, allow autonegotiation (since that 1596 * is our default case) but do not allow the advertisement to 1597 * be changed. If the advertisement matches, simply return. 1598 */ 1599 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 1600 if (!linkmode_equal(config.advertising, 1601 pl->link_config.advertising)) 1602 return -EINVAL; 1603 return 0; 1604 } 1605 1606 config.speed = SPEED_UNKNOWN; 1607 config.duplex = DUPLEX_UNKNOWN; 1608 break; 1609 1610 default: 1611 return -EINVAL; 1612 } 1613 1614 /* We have ruled out the case with a PHY attached, and the 1615 * fixed-link cases. All that is left are in-band links. 1616 */ 1617 config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE; 1618 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 1619 config.an_enabled); 1620 1621 /* If this link is with an SFP, ensure that changes to advertised modes 1622 * also cause the associated interface to be selected such that the 1623 * link can be configured correctly. 1624 */ 1625 if (pl->sfp_bus) { 1626 config.interface = sfp_select_interface(pl->sfp_bus, 1627 config.advertising); 1628 if (config.interface == PHY_INTERFACE_MODE_NA) { 1629 phylink_err(pl, 1630 "selection of interface failed, advertisement %*pb\n", 1631 __ETHTOOL_LINK_MODE_MASK_NBITS, 1632 config.advertising); 1633 return -EINVAL; 1634 } 1635 1636 /* Revalidate with the selected interface */ 1637 linkmode_copy(support, pl->supported); 1638 if (phylink_validate(pl, support, &config)) { 1639 phylink_err(pl, "validation of %s/%s with support %*pb failed\n", 1640 phylink_an_mode_str(pl->cur_link_an_mode), 1641 phy_modes(config.interface), 1642 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 1643 return -EINVAL; 1644 } 1645 } else { 1646 /* Validate without changing the current supported mask. */ 1647 linkmode_copy(support, pl->supported); 1648 if (phylink_validate(pl, support, &config)) 1649 return -EINVAL; 1650 } 1651 1652 /* If autonegotiation is enabled, we must have an advertisement */ 1653 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising)) 1654 return -EINVAL; 1655 1656 mutex_lock(&pl->state_mutex); 1657 pl->link_config.speed = config.speed; 1658 pl->link_config.duplex = config.duplex; 1659 pl->link_config.an_enabled = config.an_enabled; 1660 1661 if (pl->link_config.interface != config.interface) { 1662 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 1663 /* We need to force the link down, then change the interface */ 1664 if (pl->old_link_state) { 1665 phylink_link_down(pl); 1666 pl->old_link_state = false; 1667 } 1668 if (!test_bit(PHYLINK_DISABLE_STOPPED, 1669 &pl->phylink_disable_state)) 1670 phylink_major_config(pl, false, &config); 1671 pl->link_config.interface = config.interface; 1672 linkmode_copy(pl->link_config.advertising, config.advertising); 1673 } else if (!linkmode_equal(pl->link_config.advertising, 1674 config.advertising)) { 1675 linkmode_copy(pl->link_config.advertising, config.advertising); 1676 phylink_change_inband_advert(pl); 1677 } 1678 mutex_unlock(&pl->state_mutex); 1679 1680 return 0; 1681 } 1682 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 1683 1684 /** 1685 * phylink_ethtool_nway_reset() - restart negotiation 1686 * @pl: a pointer to a &struct phylink returned from phylink_create() 1687 * 1688 * Restart negotiation for the phylink instance specified by @pl. This will 1689 * cause any attached phy to restart negotiation with the link partner, and 1690 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 1691 * negotiation. 1692 * 1693 * Returns zero on success, or negative error code. 1694 */ 1695 int phylink_ethtool_nway_reset(struct phylink *pl) 1696 { 1697 int ret = 0; 1698 1699 ASSERT_RTNL(); 1700 1701 if (pl->phydev) 1702 ret = phy_restart_aneg(pl->phydev); 1703 phylink_mac_pcs_an_restart(pl); 1704 1705 return ret; 1706 } 1707 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 1708 1709 /** 1710 * phylink_ethtool_get_pauseparam() - get the current pause parameters 1711 * @pl: a pointer to a &struct phylink returned from phylink_create() 1712 * @pause: a pointer to a &struct ethtool_pauseparam 1713 */ 1714 void phylink_ethtool_get_pauseparam(struct phylink *pl, 1715 struct ethtool_pauseparam *pause) 1716 { 1717 ASSERT_RTNL(); 1718 1719 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 1720 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 1721 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 1722 } 1723 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 1724 1725 /** 1726 * phylink_ethtool_set_pauseparam() - set the current pause parameters 1727 * @pl: a pointer to a &struct phylink returned from phylink_create() 1728 * @pause: a pointer to a &struct ethtool_pauseparam 1729 */ 1730 int phylink_ethtool_set_pauseparam(struct phylink *pl, 1731 struct ethtool_pauseparam *pause) 1732 { 1733 struct phylink_link_state *config = &pl->link_config; 1734 bool manual_changed; 1735 int pause_state; 1736 1737 ASSERT_RTNL(); 1738 1739 if (pl->cur_link_an_mode == MLO_AN_FIXED) 1740 return -EOPNOTSUPP; 1741 1742 if (!phylink_test(pl->supported, Pause) && 1743 !phylink_test(pl->supported, Asym_Pause)) 1744 return -EOPNOTSUPP; 1745 1746 if (!phylink_test(pl->supported, Asym_Pause) && 1747 !pause->autoneg && pause->rx_pause != pause->tx_pause) 1748 return -EINVAL; 1749 1750 pause_state = 0; 1751 if (pause->autoneg) 1752 pause_state |= MLO_PAUSE_AN; 1753 if (pause->rx_pause) 1754 pause_state |= MLO_PAUSE_RX; 1755 if (pause->tx_pause) 1756 pause_state |= MLO_PAUSE_TX; 1757 1758 mutex_lock(&pl->state_mutex); 1759 /* 1760 * See the comments for linkmode_set_pause(), wrt the deficiencies 1761 * with the current implementation. A solution to this issue would 1762 * be: 1763 * ethtool Local device 1764 * rx tx Pause AsymDir 1765 * 0 0 0 0 1766 * 1 0 1 1 1767 * 0 1 0 1 1768 * 1 1 1 1 1769 * and then use the ethtool rx/tx enablement status to mask the 1770 * rx/tx pause resolution. 1771 */ 1772 linkmode_set_pause(config->advertising, pause->tx_pause, 1773 pause->rx_pause); 1774 1775 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 1776 (!(pause_state & MLO_PAUSE_AN) && 1777 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 1778 1779 config->pause = pause_state; 1780 1781 /* Update our in-band advertisement, triggering a renegotiation if 1782 * the advertisement changed. 1783 */ 1784 if (!pl->phydev) 1785 phylink_change_inband_advert(pl); 1786 1787 mutex_unlock(&pl->state_mutex); 1788 1789 /* If we have a PHY, a change of the pause frame advertisement will 1790 * cause phylib to renegotiate (if AN is enabled) which will in turn 1791 * call our phylink_phy_change() and trigger a resolve. Note that 1792 * we can't hold our state mutex while calling phy_set_asym_pause(). 1793 */ 1794 if (pl->phydev) 1795 phy_set_asym_pause(pl->phydev, pause->rx_pause, 1796 pause->tx_pause); 1797 1798 /* If the manual pause settings changed, make sure we trigger a 1799 * resolve to update their state; we can not guarantee that the 1800 * link will cycle. 1801 */ 1802 if (manual_changed) { 1803 pl->mac_link_dropped = true; 1804 phylink_run_resolve(pl); 1805 } 1806 1807 return 0; 1808 } 1809 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 1810 1811 /** 1812 * phylink_get_eee_err() - read the energy efficient ethernet error 1813 * counter 1814 * @pl: a pointer to a &struct phylink returned from phylink_create(). 1815 * 1816 * Read the Energy Efficient Ethernet error counter from the PHY associated 1817 * with the phylink instance specified by @pl. 1818 * 1819 * Returns positive error counter value, or negative error code. 1820 */ 1821 int phylink_get_eee_err(struct phylink *pl) 1822 { 1823 int ret = 0; 1824 1825 ASSERT_RTNL(); 1826 1827 if (pl->phydev) 1828 ret = phy_get_eee_err(pl->phydev); 1829 1830 return ret; 1831 } 1832 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 1833 1834 /** 1835 * phylink_init_eee() - init and check the EEE features 1836 * @pl: a pointer to a &struct phylink returned from phylink_create() 1837 * @clk_stop_enable: allow PHY to stop receive clock 1838 * 1839 * Must be called either with RTNL held or within mac_link_up() 1840 */ 1841 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) 1842 { 1843 int ret = -EOPNOTSUPP; 1844 1845 if (pl->phydev) 1846 ret = phy_init_eee(pl->phydev, clk_stop_enable); 1847 1848 return ret; 1849 } 1850 EXPORT_SYMBOL_GPL(phylink_init_eee); 1851 1852 /** 1853 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 1854 * @pl: a pointer to a &struct phylink returned from phylink_create() 1855 * @eee: a pointer to a &struct ethtool_eee for the read parameters 1856 */ 1857 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) 1858 { 1859 int ret = -EOPNOTSUPP; 1860 1861 ASSERT_RTNL(); 1862 1863 if (pl->phydev) 1864 ret = phy_ethtool_get_eee(pl->phydev, eee); 1865 1866 return ret; 1867 } 1868 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 1869 1870 /** 1871 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 1872 * @pl: a pointer to a &struct phylink returned from phylink_create() 1873 * @eee: a pointer to a &struct ethtool_eee for the desired parameters 1874 */ 1875 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) 1876 { 1877 int ret = -EOPNOTSUPP; 1878 1879 ASSERT_RTNL(); 1880 1881 if (pl->phydev) 1882 ret = phy_ethtool_set_eee(pl->phydev, eee); 1883 1884 return ret; 1885 } 1886 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 1887 1888 /* This emulates MII registers for a fixed-mode phy operating as per the 1889 * passed in state. "aneg" defines if we report negotiation is possible. 1890 * 1891 * FIXME: should deal with negotiation state too. 1892 */ 1893 static int phylink_mii_emul_read(unsigned int reg, 1894 struct phylink_link_state *state) 1895 { 1896 struct fixed_phy_status fs; 1897 unsigned long *lpa = state->lp_advertising; 1898 int val; 1899 1900 fs.link = state->link; 1901 fs.speed = state->speed; 1902 fs.duplex = state->duplex; 1903 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 1904 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 1905 1906 val = swphy_read_reg(reg, &fs); 1907 if (reg == MII_BMSR) { 1908 if (!state->an_complete) 1909 val &= ~BMSR_ANEGCOMPLETE; 1910 } 1911 return val; 1912 } 1913 1914 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 1915 unsigned int reg) 1916 { 1917 struct phy_device *phydev = pl->phydev; 1918 int prtad, devad; 1919 1920 if (mdio_phy_id_is_c45(phy_id)) { 1921 prtad = mdio_phy_id_prtad(phy_id); 1922 devad = mdio_phy_id_devad(phy_id); 1923 devad = mdiobus_c45_addr(devad, reg); 1924 } else if (phydev->is_c45) { 1925 switch (reg) { 1926 case MII_BMCR: 1927 case MII_BMSR: 1928 case MII_PHYSID1: 1929 case MII_PHYSID2: 1930 devad = __ffs(phydev->c45_ids.mmds_present); 1931 break; 1932 case MII_ADVERTISE: 1933 case MII_LPA: 1934 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 1935 return -EINVAL; 1936 devad = MDIO_MMD_AN; 1937 if (reg == MII_ADVERTISE) 1938 reg = MDIO_AN_ADVERTISE; 1939 else 1940 reg = MDIO_AN_LPA; 1941 break; 1942 default: 1943 return -EINVAL; 1944 } 1945 prtad = phy_id; 1946 devad = mdiobus_c45_addr(devad, reg); 1947 } else { 1948 prtad = phy_id; 1949 devad = reg; 1950 } 1951 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad); 1952 } 1953 1954 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 1955 unsigned int reg, unsigned int val) 1956 { 1957 struct phy_device *phydev = pl->phydev; 1958 int prtad, devad; 1959 1960 if (mdio_phy_id_is_c45(phy_id)) { 1961 prtad = mdio_phy_id_prtad(phy_id); 1962 devad = mdio_phy_id_devad(phy_id); 1963 devad = mdiobus_c45_addr(devad, reg); 1964 } else if (phydev->is_c45) { 1965 switch (reg) { 1966 case MII_BMCR: 1967 case MII_BMSR: 1968 case MII_PHYSID1: 1969 case MII_PHYSID2: 1970 devad = __ffs(phydev->c45_ids.mmds_present); 1971 break; 1972 case MII_ADVERTISE: 1973 case MII_LPA: 1974 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 1975 return -EINVAL; 1976 devad = MDIO_MMD_AN; 1977 if (reg == MII_ADVERTISE) 1978 reg = MDIO_AN_ADVERTISE; 1979 else 1980 reg = MDIO_AN_LPA; 1981 break; 1982 default: 1983 return -EINVAL; 1984 } 1985 prtad = phy_id; 1986 devad = mdiobus_c45_addr(devad, reg); 1987 } else { 1988 prtad = phy_id; 1989 devad = reg; 1990 } 1991 1992 return mdiobus_write(phydev->mdio.bus, prtad, devad, val); 1993 } 1994 1995 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 1996 unsigned int reg) 1997 { 1998 struct phylink_link_state state; 1999 int val = 0xffff; 2000 2001 switch (pl->cur_link_an_mode) { 2002 case MLO_AN_FIXED: 2003 if (phy_id == 0) { 2004 phylink_get_fixed_state(pl, &state); 2005 val = phylink_mii_emul_read(reg, &state); 2006 } 2007 break; 2008 2009 case MLO_AN_PHY: 2010 return -EOPNOTSUPP; 2011 2012 case MLO_AN_INBAND: 2013 if (phy_id == 0) { 2014 phylink_mac_pcs_get_state(pl, &state); 2015 val = phylink_mii_emul_read(reg, &state); 2016 } 2017 break; 2018 } 2019 2020 return val & 0xffff; 2021 } 2022 2023 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 2024 unsigned int reg, unsigned int val) 2025 { 2026 switch (pl->cur_link_an_mode) { 2027 case MLO_AN_FIXED: 2028 break; 2029 2030 case MLO_AN_PHY: 2031 return -EOPNOTSUPP; 2032 2033 case MLO_AN_INBAND: 2034 break; 2035 } 2036 2037 return 0; 2038 } 2039 2040 /** 2041 * phylink_mii_ioctl() - generic mii ioctl interface 2042 * @pl: a pointer to a &struct phylink returned from phylink_create() 2043 * @ifr: a pointer to a &struct ifreq for socket ioctls 2044 * @cmd: ioctl cmd to execute 2045 * 2046 * Perform the specified MII ioctl on the PHY attached to the phylink instance 2047 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 2048 * 2049 * Returns: zero on success or negative error code. 2050 * 2051 * %SIOCGMIIPHY: 2052 * read register from the current PHY. 2053 * %SIOCGMIIREG: 2054 * read register from the specified PHY. 2055 * %SIOCSMIIREG: 2056 * set a register on the specified PHY. 2057 */ 2058 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 2059 { 2060 struct mii_ioctl_data *mii = if_mii(ifr); 2061 int ret; 2062 2063 ASSERT_RTNL(); 2064 2065 if (pl->phydev) { 2066 /* PHYs only exist for MLO_AN_PHY and SGMII */ 2067 switch (cmd) { 2068 case SIOCGMIIPHY: 2069 mii->phy_id = pl->phydev->mdio.addr; 2070 fallthrough; 2071 2072 case SIOCGMIIREG: 2073 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 2074 if (ret >= 0) { 2075 mii->val_out = ret; 2076 ret = 0; 2077 } 2078 break; 2079 2080 case SIOCSMIIREG: 2081 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 2082 mii->val_in); 2083 break; 2084 2085 default: 2086 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 2087 break; 2088 } 2089 } else { 2090 switch (cmd) { 2091 case SIOCGMIIPHY: 2092 mii->phy_id = 0; 2093 fallthrough; 2094 2095 case SIOCGMIIREG: 2096 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 2097 if (ret >= 0) { 2098 mii->val_out = ret; 2099 ret = 0; 2100 } 2101 break; 2102 2103 case SIOCSMIIREG: 2104 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 2105 mii->val_in); 2106 break; 2107 2108 default: 2109 ret = -EOPNOTSUPP; 2110 break; 2111 } 2112 } 2113 2114 return ret; 2115 } 2116 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 2117 2118 /** 2119 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 2120 * link partners 2121 * @pl: a pointer to a &struct phylink returned from phylink_create() 2122 * @sync: perform action synchronously 2123 * 2124 * If we have a PHY that is not part of a SFP module, then set the speed 2125 * as described in the phy_speed_down() function. Please see this function 2126 * for a description of the @sync parameter. 2127 * 2128 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 2129 */ 2130 int phylink_speed_down(struct phylink *pl, bool sync) 2131 { 2132 int ret = 0; 2133 2134 ASSERT_RTNL(); 2135 2136 if (!pl->sfp_bus && pl->phydev) 2137 ret = phy_speed_down(pl->phydev, sync); 2138 2139 return ret; 2140 } 2141 EXPORT_SYMBOL_GPL(phylink_speed_down); 2142 2143 /** 2144 * phylink_speed_up() - restore the advertised speeds prior to the call to 2145 * phylink_speed_down() 2146 * @pl: a pointer to a &struct phylink returned from phylink_create() 2147 * 2148 * If we have a PHY that is not part of a SFP module, then restore the 2149 * PHY speeds as per phy_speed_up(). 2150 * 2151 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 2152 */ 2153 int phylink_speed_up(struct phylink *pl) 2154 { 2155 int ret = 0; 2156 2157 ASSERT_RTNL(); 2158 2159 if (!pl->sfp_bus && pl->phydev) 2160 ret = phy_speed_up(pl->phydev); 2161 2162 return ret; 2163 } 2164 EXPORT_SYMBOL_GPL(phylink_speed_up); 2165 2166 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 2167 { 2168 struct phylink *pl = upstream; 2169 2170 pl->netdev->sfp_bus = bus; 2171 } 2172 2173 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 2174 { 2175 struct phylink *pl = upstream; 2176 2177 pl->netdev->sfp_bus = NULL; 2178 } 2179 2180 static int phylink_sfp_config(struct phylink *pl, u8 mode, 2181 const unsigned long *supported, 2182 const unsigned long *advertising) 2183 { 2184 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1); 2185 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2186 struct phylink_link_state config; 2187 phy_interface_t iface; 2188 bool changed; 2189 int ret; 2190 2191 linkmode_copy(support, supported); 2192 2193 memset(&config, 0, sizeof(config)); 2194 linkmode_copy(config.advertising, advertising); 2195 config.interface = PHY_INTERFACE_MODE_NA; 2196 config.speed = SPEED_UNKNOWN; 2197 config.duplex = DUPLEX_UNKNOWN; 2198 config.pause = MLO_PAUSE_AN; 2199 config.an_enabled = pl->link_config.an_enabled; 2200 2201 /* Ignore errors if we're expecting a PHY to attach later */ 2202 ret = phylink_validate(pl, support, &config); 2203 if (ret) { 2204 phylink_err(pl, "validation with support %*pb failed: %d\n", 2205 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 2206 return ret; 2207 } 2208 2209 iface = sfp_select_interface(pl->sfp_bus, config.advertising); 2210 if (iface == PHY_INTERFACE_MODE_NA) { 2211 phylink_err(pl, 2212 "selection of interface failed, advertisement %*pb\n", 2213 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); 2214 return -EINVAL; 2215 } 2216 2217 config.interface = iface; 2218 linkmode_copy(support1, support); 2219 ret = phylink_validate(pl, support1, &config); 2220 if (ret) { 2221 phylink_err(pl, "validation of %s/%s with support %*pb failed: %d\n", 2222 phylink_an_mode_str(mode), 2223 phy_modes(config.interface), 2224 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 2225 return ret; 2226 } 2227 2228 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 2229 phylink_an_mode_str(mode), phy_modes(config.interface), 2230 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 2231 2232 if (phy_interface_mode_is_8023z(iface) && pl->phydev) 2233 return -EINVAL; 2234 2235 changed = !linkmode_equal(pl->supported, support) || 2236 !linkmode_equal(pl->link_config.advertising, 2237 config.advertising); 2238 if (changed) { 2239 linkmode_copy(pl->supported, support); 2240 linkmode_copy(pl->link_config.advertising, config.advertising); 2241 } 2242 2243 if (pl->cur_link_an_mode != mode || 2244 pl->link_config.interface != config.interface) { 2245 pl->link_config.interface = config.interface; 2246 pl->cur_link_an_mode = mode; 2247 2248 changed = true; 2249 2250 phylink_info(pl, "switched to %s/%s link mode\n", 2251 phylink_an_mode_str(mode), 2252 phy_modes(config.interface)); 2253 } 2254 2255 pl->link_port = pl->sfp_port; 2256 2257 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 2258 &pl->phylink_disable_state)) 2259 phylink_mac_initial_config(pl, false); 2260 2261 return ret; 2262 } 2263 2264 static int phylink_sfp_module_insert(void *upstream, 2265 const struct sfp_eeprom_id *id) 2266 { 2267 struct phylink *pl = upstream; 2268 unsigned long *support = pl->sfp_support; 2269 2270 ASSERT_RTNL(); 2271 2272 linkmode_zero(support); 2273 sfp_parse_support(pl->sfp_bus, id, support); 2274 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, support); 2275 2276 /* If this module may have a PHY connecting later, defer until later */ 2277 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id); 2278 if (pl->sfp_may_have_phy) 2279 return 0; 2280 2281 return phylink_sfp_config(pl, MLO_AN_INBAND, support, support); 2282 } 2283 2284 static int phylink_sfp_module_start(void *upstream) 2285 { 2286 struct phylink *pl = upstream; 2287 2288 /* If this SFP module has a PHY, start the PHY now. */ 2289 if (pl->phydev) { 2290 phy_start(pl->phydev); 2291 return 0; 2292 } 2293 2294 /* If the module may have a PHY but we didn't detect one we 2295 * need to configure the MAC here. 2296 */ 2297 if (!pl->sfp_may_have_phy) 2298 return 0; 2299 2300 return phylink_sfp_config(pl, MLO_AN_INBAND, 2301 pl->sfp_support, pl->sfp_support); 2302 } 2303 2304 static void phylink_sfp_module_stop(void *upstream) 2305 { 2306 struct phylink *pl = upstream; 2307 2308 /* If this SFP module has a PHY, stop it. */ 2309 if (pl->phydev) 2310 phy_stop(pl->phydev); 2311 } 2312 2313 static void phylink_sfp_link_down(void *upstream) 2314 { 2315 struct phylink *pl = upstream; 2316 2317 ASSERT_RTNL(); 2318 2319 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 2320 } 2321 2322 static void phylink_sfp_link_up(void *upstream) 2323 { 2324 struct phylink *pl = upstream; 2325 2326 ASSERT_RTNL(); 2327 2328 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); 2329 phylink_run_resolve(pl); 2330 } 2331 2332 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII 2333 * or 802.3z control word, so inband will not work. 2334 */ 2335 static bool phylink_phy_no_inband(struct phy_device *phy) 2336 { 2337 return phy->is_c45 && 2338 (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150; 2339 } 2340 2341 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 2342 { 2343 struct phylink *pl = upstream; 2344 phy_interface_t interface; 2345 u8 mode; 2346 int ret; 2347 2348 /* 2349 * This is the new way of dealing with flow control for PHYs, 2350 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 2351 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 2352 * using our validate call to the MAC, we rely upon the MAC 2353 * clearing the bits from both supported and advertising fields. 2354 */ 2355 phy_support_asym_pause(phy); 2356 2357 if (phylink_phy_no_inband(phy)) 2358 mode = MLO_AN_PHY; 2359 else 2360 mode = MLO_AN_INBAND; 2361 2362 /* Do the initial configuration */ 2363 ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising); 2364 if (ret < 0) 2365 return ret; 2366 2367 interface = pl->link_config.interface; 2368 ret = phylink_attach_phy(pl, phy, interface); 2369 if (ret < 0) 2370 return ret; 2371 2372 ret = phylink_bringup_phy(pl, phy, interface); 2373 if (ret) 2374 phy_detach(phy); 2375 2376 return ret; 2377 } 2378 2379 static void phylink_sfp_disconnect_phy(void *upstream) 2380 { 2381 phylink_disconnect_phy(upstream); 2382 } 2383 2384 static const struct sfp_upstream_ops sfp_phylink_ops = { 2385 .attach = phylink_sfp_attach, 2386 .detach = phylink_sfp_detach, 2387 .module_insert = phylink_sfp_module_insert, 2388 .module_start = phylink_sfp_module_start, 2389 .module_stop = phylink_sfp_module_stop, 2390 .link_up = phylink_sfp_link_up, 2391 .link_down = phylink_sfp_link_down, 2392 .connect_phy = phylink_sfp_connect_phy, 2393 .disconnect_phy = phylink_sfp_disconnect_phy, 2394 }; 2395 2396 /* Helpers for MAC drivers */ 2397 2398 /** 2399 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper 2400 * @state: a pointer to a &struct phylink_link_state 2401 * 2402 * Inspect the interface mode, advertising mask or forced speed and 2403 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching 2404 * the interface mode to suit. @state->interface is appropriately 2405 * updated, and the advertising mask has the "other" baseX_Full flag 2406 * cleared. 2407 */ 2408 void phylink_helper_basex_speed(struct phylink_link_state *state) 2409 { 2410 if (phy_interface_mode_is_8023z(state->interface)) { 2411 bool want_2500 = state->an_enabled ? 2412 phylink_test(state->advertising, 2500baseX_Full) : 2413 state->speed == SPEED_2500; 2414 2415 if (want_2500) { 2416 phylink_clear(state->advertising, 1000baseX_Full); 2417 state->interface = PHY_INTERFACE_MODE_2500BASEX; 2418 } else { 2419 phylink_clear(state->advertising, 2500baseX_Full); 2420 state->interface = PHY_INTERFACE_MODE_1000BASEX; 2421 } 2422 } 2423 } 2424 EXPORT_SYMBOL_GPL(phylink_helper_basex_speed); 2425 2426 static void phylink_decode_c37_word(struct phylink_link_state *state, 2427 uint16_t config_reg, int speed) 2428 { 2429 bool tx_pause, rx_pause; 2430 int fd_bit; 2431 2432 if (speed == SPEED_2500) 2433 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 2434 else 2435 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 2436 2437 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 2438 2439 if (linkmode_test_bit(fd_bit, state->advertising) && 2440 linkmode_test_bit(fd_bit, state->lp_advertising)) { 2441 state->speed = speed; 2442 state->duplex = DUPLEX_FULL; 2443 } else { 2444 /* negotiation failure */ 2445 state->link = false; 2446 } 2447 2448 linkmode_resolve_pause(state->advertising, state->lp_advertising, 2449 &tx_pause, &rx_pause); 2450 2451 if (tx_pause) 2452 state->pause |= MLO_PAUSE_TX; 2453 if (rx_pause) 2454 state->pause |= MLO_PAUSE_RX; 2455 } 2456 2457 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 2458 uint16_t config_reg) 2459 { 2460 if (!(config_reg & LPA_SGMII_LINK)) { 2461 state->link = false; 2462 return; 2463 } 2464 2465 switch (config_reg & LPA_SGMII_SPD_MASK) { 2466 case LPA_SGMII_10: 2467 state->speed = SPEED_10; 2468 break; 2469 case LPA_SGMII_100: 2470 state->speed = SPEED_100; 2471 break; 2472 case LPA_SGMII_1000: 2473 state->speed = SPEED_1000; 2474 break; 2475 default: 2476 state->link = false; 2477 return; 2478 } 2479 if (config_reg & LPA_SGMII_FULL_DUPLEX) 2480 state->duplex = DUPLEX_FULL; 2481 else 2482 state->duplex = DUPLEX_HALF; 2483 } 2484 2485 /** 2486 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 2487 * @state: a pointer to a struct phylink_link_state. 2488 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 2489 * 2490 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 2491 * code word. Decode the USXGMII code word and populate the corresponding fields 2492 * (speed, duplex) into the phylink_link_state structure. 2493 */ 2494 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 2495 uint16_t lpa) 2496 { 2497 switch (lpa & MDIO_USXGMII_SPD_MASK) { 2498 case MDIO_USXGMII_10: 2499 state->speed = SPEED_10; 2500 break; 2501 case MDIO_USXGMII_100: 2502 state->speed = SPEED_100; 2503 break; 2504 case MDIO_USXGMII_1000: 2505 state->speed = SPEED_1000; 2506 break; 2507 case MDIO_USXGMII_2500: 2508 state->speed = SPEED_2500; 2509 break; 2510 case MDIO_USXGMII_5000: 2511 state->speed = SPEED_5000; 2512 break; 2513 case MDIO_USXGMII_10G: 2514 state->speed = SPEED_10000; 2515 break; 2516 default: 2517 state->link = false; 2518 return; 2519 } 2520 2521 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 2522 state->duplex = DUPLEX_FULL; 2523 else 2524 state->duplex = DUPLEX_HALF; 2525 } 2526 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 2527 2528 /** 2529 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 2530 * @pcs: a pointer to a &struct mdio_device. 2531 * @state: a pointer to a &struct phylink_link_state. 2532 * 2533 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2534 * clause 37 negotiation and/or SGMII control. 2535 * 2536 * Read the MAC PCS state from the MII device configured in @config and 2537 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 2538 * the phylink @state structure. This is suitable to be directly plugged 2539 * into the mac_pcs_get_state() member of the struct phylink_mac_ops 2540 * structure. 2541 */ 2542 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 2543 struct phylink_link_state *state) 2544 { 2545 int bmsr, lpa; 2546 2547 bmsr = mdiodev_read(pcs, MII_BMSR); 2548 lpa = mdiodev_read(pcs, MII_LPA); 2549 if (bmsr < 0 || lpa < 0) { 2550 state->link = false; 2551 return; 2552 } 2553 2554 state->link = !!(bmsr & BMSR_LSTATUS); 2555 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 2556 /* If there is no link or autonegotiation is disabled, the LP advertisement 2557 * data is not meaningful, so don't go any further. 2558 */ 2559 if (!state->link || !state->an_enabled) 2560 return; 2561 2562 switch (state->interface) { 2563 case PHY_INTERFACE_MODE_1000BASEX: 2564 phylink_decode_c37_word(state, lpa, SPEED_1000); 2565 break; 2566 2567 case PHY_INTERFACE_MODE_2500BASEX: 2568 phylink_decode_c37_word(state, lpa, SPEED_2500); 2569 break; 2570 2571 case PHY_INTERFACE_MODE_SGMII: 2572 case PHY_INTERFACE_MODE_QSGMII: 2573 phylink_decode_sgmii_word(state, lpa); 2574 break; 2575 2576 default: 2577 state->link = false; 2578 break; 2579 } 2580 } 2581 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 2582 2583 /** 2584 * phylink_mii_c22_pcs_set_advertisement() - configure the clause 37 PCS 2585 * advertisement 2586 * @pcs: a pointer to a &struct mdio_device. 2587 * @interface: the PHY interface mode being configured 2588 * @advertising: the ethtool advertisement mask 2589 * 2590 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2591 * clause 37 negotiation and/or SGMII control. 2592 * 2593 * Configure the clause 37 PCS advertisement as specified by @state. This 2594 * does not trigger a renegotiation; phylink will do that via the 2595 * mac_an_restart() method of the struct phylink_mac_ops structure. 2596 * 2597 * Returns negative error code on failure to configure the advertisement, 2598 * zero if no change has been made, or one if the advertisement has changed. 2599 */ 2600 int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs, 2601 phy_interface_t interface, 2602 const unsigned long *advertising) 2603 { 2604 u16 adv; 2605 2606 switch (interface) { 2607 case PHY_INTERFACE_MODE_1000BASEX: 2608 case PHY_INTERFACE_MODE_2500BASEX: 2609 adv = ADVERTISE_1000XFULL; 2610 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2611 advertising)) 2612 adv |= ADVERTISE_1000XPAUSE; 2613 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2614 advertising)) 2615 adv |= ADVERTISE_1000XPSE_ASYM; 2616 2617 return mdiodev_modify_changed(pcs, MII_ADVERTISE, 0xffff, adv); 2618 2619 case PHY_INTERFACE_MODE_SGMII: 2620 return mdiodev_modify_changed(pcs, MII_ADVERTISE, 0xffff, 0x0001); 2621 2622 default: 2623 /* Nothing to do for other modes */ 2624 return 0; 2625 } 2626 } 2627 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement); 2628 2629 /** 2630 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 2631 * @pcs: a pointer to a &struct mdio_device. 2632 * @mode: link autonegotiation mode 2633 * @interface: the PHY interface mode being configured 2634 * @advertising: the ethtool advertisement mask 2635 * 2636 * Configure a Clause 22 PCS PHY with the appropriate negotiation 2637 * parameters for the @mode, @interface and @advertising parameters. 2638 * Returns negative error number on failure, zero if the advertisement 2639 * has not changed, or positive if there is a change. 2640 */ 2641 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode, 2642 phy_interface_t interface, 2643 const unsigned long *advertising) 2644 { 2645 bool changed; 2646 u16 bmcr; 2647 int ret; 2648 2649 ret = phylink_mii_c22_pcs_set_advertisement(pcs, interface, 2650 advertising); 2651 if (ret < 0) 2652 return ret; 2653 2654 changed = ret > 0; 2655 2656 /* Ensure ISOLATE bit is disabled */ 2657 if (mode == MLO_AN_INBAND && 2658 linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, advertising)) 2659 bmcr = BMCR_ANENABLE; 2660 else 2661 bmcr = 0; 2662 2663 ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 2664 if (ret < 0) 2665 return ret; 2666 2667 return changed ? 1 : 0; 2668 } 2669 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 2670 2671 /** 2672 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 2673 * @pcs: a pointer to a &struct mdio_device. 2674 * 2675 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2676 * clause 37 negotiation. 2677 * 2678 * Restart the clause 37 negotiation with the link partner. This is 2679 * suitable to be directly plugged into the mac_pcs_get_state() member 2680 * of the struct phylink_mac_ops structure. 2681 */ 2682 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 2683 { 2684 int val = mdiodev_read(pcs, MII_BMCR); 2685 2686 if (val >= 0) { 2687 val |= BMCR_ANRESTART; 2688 2689 mdiodev_write(pcs, MII_BMCR, val); 2690 } 2691 } 2692 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 2693 2694 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 2695 struct phylink_link_state *state) 2696 { 2697 struct mii_bus *bus = pcs->bus; 2698 int addr = pcs->addr; 2699 int stat; 2700 2701 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 2702 if (stat < 0) { 2703 state->link = false; 2704 return; 2705 } 2706 2707 state->link = !!(stat & MDIO_STAT1_LSTATUS); 2708 if (!state->link) 2709 return; 2710 2711 switch (state->interface) { 2712 case PHY_INTERFACE_MODE_10GBASER: 2713 state->speed = SPEED_10000; 2714 state->duplex = DUPLEX_FULL; 2715 break; 2716 2717 default: 2718 break; 2719 } 2720 } 2721 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 2722 2723 MODULE_LICENSE("GPL v2"); 2724